Gustay bloem



(No Model.)

G. BLOEM. a'

SHELL POR DETONATING CAPS.

Patented May 25, 1886.

By @vim rdm/ ATTUH/VEVLS,

UNITED STATES PATENT OFFICE.

GUSTAV BLOEM, OF DUSSELDORF, PBUSSIA, GERMANY.

SHELL FOR DETONATING CAPS.

SPECIFICATION forming part of Letters Patent No. 342,423, dated May 25, 1886. Application filed January Q0, 1886. Serial No. 189,131. No model.)

To all whom it T11/ty concern..-

Be it known that I, GUsTV BLOEM, of Dusseldorf, in the Kingdom of Prussia, German Empire, have invented certain Improvements in Shells for Fulminate and Dynamite Exploders and Cotton-Powder or Gun-Cotton Detonators, of which the following` is a full and clear specification, reference being had to the accompanying drawings, forming part of the specification, in which the same letters of referenee indicate corresponding parts in all figures.

In the drawings, Figures l, 2, and 3 are sectional views showing the invention. Figs. 4, 5, and 6 show different forms of shell-bottoms.

The invention relates to an improved construction of the shell of exploders or blastingcaps or detonators filled with a fulminating compound, and used as primers to explode blasts or charges of gunpowder, dynamite, gun-cotton or cotton-powder and similar explosive substances.

Ihe invention consists in combining such a Y shell having a weak bottom with an outer cylindrical strong sleeve.

The bottom b of the shell a is pierced, (see Figs. l and 5,) without disengaging therefrom any portions of the bottom or otherwise made quite thin and weak. The shella is surrounded as far as the fulminating compound extends by a sleeve, c, (or more than one,) grasping by a narrow inward rim, d, under the edge of the bottom b. The sleeve c or the sleeves may project from the outside of the shell a, as in Figs. 1 and 3, orbe Hush with it, asin Fig. 2, in which latter case the inside diameter of the shell a becomes at this place smaller in proportion. By these constructions the concentration of the efect of the explosion in an axial direction of the exploder isincreased. It must be remarked that the bottom b of such exploder with sleeve c, or sleeves, may be pressed inward hemispherically, as in Fig. 6.

The improved shell is used in blasting-caps, exploders, or detonators for gunpowder, dynamite, gun-cotton or cotton-powder, and other explosive substances.

I claim" The shell a, having weak bottom b,combined with the surrounding sleeve or sleeves c, having inward ri m,d,substantially as herei n shown and described.

This specification signed by me this 18th day of' December, 1885.

' GUSTAV BLOEM. [L s] \Vitnesses: Y

FR. F. BLOEM,

JEROME ERNsT. 

